1. U.S. energy information administration. 〈http://www.eia.gov〉.
2. The international council on clean transportation. 〈http://www.theicct.org〉.
3. Global energy consumption due to friction in passenger cars;Holmberg;Tribol Int,2012
4. Boness R. Churning losses of discs and gears running partially submerged in oil. In: Proceedings of the ASME international power transactions gearing conference, vol. 1; 1989. p. 355–9.
5. Hydraulic losses in gearboxes with oil immersion;Terekhov;Vestnik Mashinostroeniya,1975